Sonic Rivals - Sony PSP Go head-to-head with your buddy and trip, shove, even vault over each other as you hurtle towards the finish line at breakneck speed Compete one-on-one with each of your rivals will feel just as competitive as if playing against an actual player Sonic style 2D gameplay in true 3D environments, custom-built for the PSP Race in Sonic&apos;s traditional 2D gameplay, but throughout obstacle-filled 3D tracks, enhancing the thrills of the race Built from the ground-up to maximize the technical potential of the PSP